.• What is the guarantor's credit score?

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

For instance if someone has a really low credit score but their previous landlord said they were an ideal tenant and they passed income requirements I may take them.  

Do you have a credit score here in the US?

My current FICO score is approx. 800, and self employed. 

Most people get stuck on terms, and terms will vary upon lender, credit score, experience, asset location. 

However, their high income/credit scores are a problem.

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

So:Am I right in guessing that if I sell her my stake in the house and take my name off the deed, but I leave the mortgage alone (with both our names on it), my credit score would plummet? 

For example, minimum 650 credit score and 3x rent for gross income.